Author Topic: General Discussion  (Read 2944 times)

hruthika

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Re: General Discussion
« Reply #30 on: May 29, 2014, 01:58:24 AM »
Hello,

The Internet Control Message Protocol (ICMP) is one of the main protocols of the Internet Protocol Suite. It is used by network devices, like routers, to send error messages indicating, for example, that a requested service is not available or that a host or router could not be reached. ICMP can also be used to relay query messages.[1] It is assigned protocol number 1.[2] ICMP[3] differs from transport protocols such as TCP and UDP in that it is not typically used to exchange data between systems, nor is it regularly employed by end-user network applications (with the exception of some diagnostic tools like ping and traceroute).

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Hruthika.

swetha

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Re: General Discussion
« Reply #31 on: May 29, 2014, 03:34:46 AM »
hii,

Distributed-queue dual-bus

  In telecommunication, a distributed-queue dual-bus network (DQDB) is a distributed multi-access network that  supports integrated communications using a dual bus and distributed queuing,  provides access to local or metropolitan area networks, and  supports connectionless data transfer, connection-oriented data transfer, and isochronous communications, such as voice communications.


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swetha.

priyanka

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Re: General Discussion
« Reply #32 on: May 29, 2014, 03:45:47 AM »
hi,

Simple Loop Prevention Protocol (SLPP) provides active protection against Layer 2 network loops on a per-VLAN basis. SLPP uses a lightweight hello packet mechanism to detect network loops. SLPP packets are sent using Layer 2 multicast and a switch will only look at its own SLPP packets or at its peer SLPP packets. It will ignore SLPP packets from other parts of the network. Sending hello packets on a per VLAN basis allows SLPP to detect VLAN based network loops for un-tagged as well as tagged IEEE 802.1Q VLAN link configurations. Once a loop is detected, the port is shutdown. The SLPP functionality is configured using the following criteria:

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priyanka